Timer



FIG. 1 is an environmental perspective view of a timer showing my new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a top view thereof.

The broken line showing of the indicia in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a timer, as shown and described. 